Improvement in elevators



2 Sh eets sheet 1.

E. SGHLENKEB.

'Elevators.

Patented Oct. 20, 1874..

' No.l56,067.

' L ilmwea.

2 Sheet --Sheet 2.1

E. SCH LEN KER.

Elevators.

Patented Oct. 20, 1874.

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UNITED STATES PATENT OFFICE.

Eli-HARD SOHLENKER, OF BUFFALO, NEW YORK, ASSIGNOR OF ONE-HALF HIS RIGHTTO RUFUS L. HOWARD AND GIBSON F. HOWARD, OF SAME PLACE.

IMPROVEMENT IN ELEVATORS.

Specification forming part of Letters Patent No. 156,067, dated October20, 1874 application filed June 16, 1874.

To all whom it may concern:

Be it known that I, ERHARD ScnL nKER, of Buffalo, in the State of NewYork, have invented a Power Hoisting-Machine, of which the following isa specification:

The object of my invention is to provide an economical, safe, and rapidhoisting-machine, for operation by steam power.

In the accompanying drawings, Figure 1 is a perspective view, showing myimproved hoisting-machine. Fig. 2 is a vertical sectional view of theplatform, showing the ways, safety-ratchets, &c. Fig. 2, a a, is acrossscction of one side of the platform-ways; and Fig. 2, b b, is avertical section of part of the ratchet.

A A represent the upright ways B, the

I ratchet; G, the platform; D, the draw-head,

secured to the uprights e e. f is the safetyweight or counterpoise,connected with the cam g by means of the rope or chain 00. h is thelifting rope or chain that connects with the winding-drum. These ropesor chains a and h pass over pulleys w and h, and connect with the cam g.3 y are levers or bars at- I tached to the draw-head D, the inner endsof which are arranged to be operated by contact of the cam g, and theirouter ends have loops or eyes through which are passed the upper ends oflong spring ratchets or bars Z Z. These ratchetbars Z extend downward,and are secured to the uprights e 6, near to the platform 0. Their upperends are also connected to the draw-head D by springs z.

The operation of the safety device is as follows: The ropes h and Itbeing firmly secured to the outer periphery of the cam g, the latterwill be retained in its normal position so long as there is any strainon the lifting-rope, or so long as the platform continues to besuspended thereby, and in this position the platform will be free torise and descend, as required; but should the lifting-rope from anycause break, or become detached, so as no longer to suspend and sustainthe platform, the counterpoise weight f will then operate by itsgravity, and through its connecting-rope X will cause the cam to turn onits shaft or spindle and push out the rods or levers y, the

inner ends of which rest against the face of the cam, thereby causingthe ratchet ends of the spring-bars z to engage with the ratchets B, andimmediately arrest the fall of the platform, and hold it securely untilthe damage or break in the lifting-rope is repaired.

J is a shaft, having a gear .,or pinion, j, which controls the operationof the brake and shipper bar K, for shifting the belt D on the pulleys.l is a crank on the end of the shaft J. m is the brake-lever, having ashoe, m. The free end of the lever m is connected with the crank l, bymeans of a rod, 1, a rubberblock or cushion, Z, being inserted betweenthe head of the rod l and the end of thelevers, so as to break the blowand compensate fonwear. n is the brake-pulley, which is mounted on theshaft 0. p is a grooved wheel on the inner end of the shaft J. g is arod passing vertically through brackets or eyes q, secured to one of theways A. It is provided with a number of projecting dogs, 8, which areadjustably secured to the rod at any required distance apart. 4" is acord, which connects the rod q with the grooved wheel or pulley p. trepresents a stopping and locking device, which is secured to the 11right 6 next to the rod q. As shown by' s and lpof the drawings, itconsists of a racket'or arm, 1/, to the outer end of which is pivotedtwo lockin g-levers, 0 o, and to which is also secured a projecting-armor stop-pin, p. O is a hollow shaft mounted in proper bearings, on oneend of which, as before stated, is thebrake-pulley a. V V are twoband-pulleys, loosely mounted on this shaft, and m is a tight pulleysecured to said shaft, so as to turn with it. Belts 1; 1:, arranged torun in opposite directions, connect these pulleys with thecounter-pulley 1c. t' represents the winding-drum, mounted on the shaft0, and provided with internal bearings d d, for the gear wheels orpinions g g.

and 11' i. h is the internal gear-wheel to which the power istransferred from the pinions g g. It is keyed fast to pinion 70 whichrevolves loose on the shaft 0. The pinions t" t" transfer the power, andare connected by gearing in the inner side of the drum i and to pinionlo n is a notch-or angular opening cut in flange of the windingdrum i,in which the end of the rope is secured in such manner that in case theplatform gets foul and the rope unwinds it will become detached from thedrum. to is a small cord, attached at one end to the grooved pulley p,and passed between two small pulleys near the bottom, and over anotherat the top of way A, its other end carrying a weight, 21/. This deviceis used to stop the elevator should the starting-rod q fail to operate.The rope or cord a being fastened to the grooved pulley on a linepassing between the two small pulleys, it will wind in the groovedpulley in either direction, and by pulling upon it it will operate tostop the machine in the same manner as the rod q, as

hereinafter more fully set forth.

The operation of the machine not previously hereinbefore set forth, isas follows: In order to start the machine by pulling down uponv thestarting or stopping rod q the shaft J will revolve through theoperation of the wheel 19, and, revolving, will move the shipping-rodla, and thereby ship the belt from the loose to the tight pulley, at thesame time releasing the brake from the pulley or wheel a. The

shaft 0 will now revolve, and with it the Winding-drum I, and thereby,through the winding of the rope h, the platform will be elevated. Whenit is desired to stop the platform the operator turns the.l0werlock-lever 0 so that it will strike one of the dogs 8, and, remaining incontact with it, will raise the rod q, thereby-reversing the operationbefore described, and stopping the machine; To look the machine when thedesired elevation is reached, the upper locking-lever is turned so as toturn the rod q and bring the dog between the lockinglevers, therebysecurely holding it,

- so that it cannot be moved in either direction,

or the machinery be disturbed or operated until again set in motion bythe operator upon the platform. To reverse the motion and cause theplatform to descend, both the lockinglevers 0 are turned out of the way,and clear of the dogs on the rod q, which is then lifted up, therebycausing the shaft J to revolve in the opposite direction from thatbefore described, thereby releasing the brake-shoe and shifting thebelt, as before, and causing the platform to descend until the stop-pinp of the device t comes in contact with the lower dog 8, and again stopsthe machine. The same pin p will prevent the platform rising too high bycoming in contact with the upper dog 8, which is secured at the properheight on the rod for that purpose.

In case the platform should meet with any obstruction in its descent,and the lifting-rope uncoil itself off from the drum, it will becomedetached orunhooked as soon as all is uncoiled through the notch oropening, allowing the knotted end to slip out, and thereby be preventedfrom rewinding upon the drum in an opposite direction.

Having thus described my improved hoisting apparatus, what I claim as myinvention,

and desire to secure by Letters Patent, is-

l. The cam g, in combination with the lever y, spring-bars z, andratchets B, substan tially as and for the purpose specified.

2. The rod q, having dogs s or equivalent device, operating incombination with the levers or striking and locking bars 0 0, stop-pinp, cord 1', and wheel 19, and with hoisting mechanism, substantially asand for the purpose specified.

3. The flanged drum 6, having countersink notches n for the reception ofthe knotted end of the rope h, as and for the purpose set forth.

4. The combination of the drum t, shaft 0, pulleys V V and m,shipper-bar 7c, shaft J, and pinion j, all operating in connection witha starting and stopping device, substantially as and for the purposespecified.

5. In combination with the starting and stopping device, the shaft J,crank 1, rod l, rubber-block l, lever m, and shoe m, all operatingsubstantially as and for the purpose specified.

Eli-HARD SGHLENKER.

Witnesses:

P. P. BURrIs, SoLoMoN FINLEY.

